Extension-cylinder for pin-locks.



No. 70l,850. Patented lune- I0, |902.

I A. CRAMOND.

EXTENSION CYLINDER FUR PIN LOCKS.

(Application fild Jan. 14, 1902.)

(No Model.)

ETERs co.wHowuwm-mmmmm n D UNITED STATES PATENT OFFICE.

ALEXANDER CRAMOND, OF LYONS, IOWA.

EXTENSION-CYLINDER FOR PIN-LOCKS.

SPECIFICATION forming part of Letters Patent No. 701,850, dated June 10,1902.

I Application filed January 14, 1902. Serial No. 89,655. (No model.)

To aZZ whom it may concern:

Be it known that I, ALEXANDER CRAMOND, a citizen of the United States,residing at Lyons, in the county of Clinton and State of Iowa, haveinvented certain new and useful Improvements in Exteusion- Cylinders forPin-Locks, of which the following is a specification.

My invention pertains to that class of locks for doors known ascylinder-locks, and especially has relation to cylinders that arecapable of being extended or shortened, so

that they may be fitted to and used upon doors of difierent thicknesses.

The object of my invention is to provide a novel lock of thisgeneraltype having means for easy and ready adjustment for the purposesset forth and involving certain features of construction which provide asimple, compact, and eflicient device of the class described.

In the accompanying drawings, which omit the usual lock-case and latch,Figure 1 is a side view of the parts constituting my improved cylinderadapted to be assembled in a lock-case of any'suitable type and showingthe block containing the pin-chamber and key-plug drawn partially out ofthe cam-chamber to disposethe parts to fit a thick doorQ Fig, 2 is afront view of the cylinder. Fig. 3 is-a top plan view of the parts ofFig. l with a portion of the shell broken away to show the adjlisting-pin in the cylinder. Fig. 4 is a rear elevation of the partsshown in Fig. 2 and showing the rotating cam or disk by which'the boltor latch is operated. Fig. 5 is a central longitudinal section taken onthe'line 5 5 of Fig. 3. Fig. 6 is a transverse sectional View, in thedirection of the arrows on theline 6 6 of Fig. 5. Fig. 7 is a rearperspective view of the cylinder or block containing the pin-chamber andkey-plug, and Fig. 8 is a perspective view looking into the interior ofthe shell and showing the connecting-rods locatedtherein.

The lock-case with which my improvements are associated may be of anysuitable type and may be secured to or mortised into a door, if desired,in any suitable manner and is provided with a hole or bore in one sideto receive the case containing the matter of my invention. For thepurpose of, securing the case in the lock-case one part of the case,

such as the shell A, is provided with a screwthread a,-.ex'tendi ng overmore or less of its outer surface and which engages a correspond ingthread or tap in the hole of the lockcase.

shell, preferably cup-shaped and cylindrical in cross-section, as shownin the drawings, and isprovided near the lower portion of its cap a witha perforation a which receives a circular washer a? of correspondingsize,

having a countersunk portion to form a flange 0, adaptedto bear againstthe wall of the cap. The washer or plate a is provided, preferably onopposite sides ofits median line, with perforations or holes to. receivethe connecting-rods A, which extendforwardly approximately the length ofthe shell and are slightly reduced orshouldered where they pass throughthe Washer and extend beyond the rear wall ofthecap a where they receivea cam AZ-to'which they are'suitably secured, as by being headed over.The cam is somewhat larger in diameterthanxtheperforation in the cap,andby this organization the washer is retained and held againstdisplacement within the hole or perforation a in which it is, however,free to turn in either direction.

The cam A connects with the bolt or latch of the lock-case by'anysuitable intermediate means, whereby the bolt or latch will be thrown inwhichever direction the cam is turned, the latter being of any suitableform and construction.

The block B is preferably composed of a plug ofnietal adapted to fitwithin the shell A and having the usual front flange or escutcheons b,as shown. 1The block is provided with a longitudinal bore or channelthroughout its-length and located, preferably, at one side of the centerthereof.

The key-plugC is located within the horizontal bore of the block and isheld against displacement by suitable front and rear flanges c and c, itbeing free, however, to retate therein. The positions of the Washer aand of the key-plug C are such that when the cylinder B is insertedwithin the shell Athe key-cylinder and washer are in alinement. Thekey-plug C is provided with longitudinal bores 0 extending nearly to thefront wall The chamber A is in the form of a hollow' thereof and whichreceive the rods A when the parts are assembled, whereby the keyplug andwasher are connected to move in unison, the bores and rods being of suchlengths as to preserve this connection in any position of the cylinder Bwithin the shell A, as shown in Figs. 3 and 5, where these parts areillustrated in their relation of greatest separation.

The block B is provided with a tumblerchamber or pin-chamber above thekey-plug, which is preferably of any suitable construction and receivesa series of loose tumblers 12', adapted to move therein and arranged inany suitable well-known manner. The tumblers or pins are preferablycomposed of upper and lower portions or parts, the lines of division ofthe several pins being staggered or irregular, and each pin ispreferably located in a cell of the chamber formed by dividing walls orpartitions 6 In the most practical form the pins are associated withoperating-springs b. The pin-chamber is closed at its top by means of aplate 12 and communicates at its lower end with a channel or slot 0 inthe top of the key-plug, the channel normally standing in alinement withthe pin-chamber and adapted to receive thelower ends of the tumblers,which normally rest therein upon a suitable ledge or shelf o extendinglaterally within the key-open ing of the key-plug, whereby the tumblersare exposed to the upper edge of the key, which is provided with a slotin its side to receive the ledge or rib in the wellknown manner. Thetumblers are of any suitable construction, whereby when the key isinserted in the key-cylinder it will cause the tumblers to be raised toaline their dividing-lines with the line of the key-plug to enable theplug to be turned to operate the cam A The shell A and the block I3 areconnected together in their several adjustments by any suitable means,preferably by the arrangement shown, which consists in providing aseries of holes or perforations a in the shell A and arranged insuitable andpredetermined distances apart to receive a spring-pressedpin I), carried in a recess in the rear portion of the block B and inline with the pin-chamber, the disposition of the parts being such thatthe length of the case composed of the shell A and the block B may bevaried to correspond with the different thicknesses of the doors byadapting the pin 12 to the appropriate hole in the shell. The pin passesthrough the plate I) and is shouldered at its top to prevent its springb from pushing it out of its recess or chamber, as shown in Figs.

5 and 6. The shell and block are provided with corresponding ribs andgrooves a. and 12 respectively, whereby the parts are locked together ina rigid manner to prevent rotation of the one with reference to theother and to take the strain off the pin 7) when the shell is beingscrewed to its seat in the lock-case.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. In a lock, the combination with a shell, a cam mounted thereon, andoperating-rods secured to the cam, of a block having a keyplugadjnstably engaging the rods, and an adjustable connection between theshell and block.

2. In alock,the combination withathreaded shell provided with a seriesof holes, a cam mounted on the shell, and operating-rods secured to thecam, of a block having a keyplug adjustably engaging the rods, and aspring-pressed pin on the block adapted to enter the holes in the shell.

3. In alock,the combination withathreaded shell provided with a seriesof perforations, a cam mounted thereon, and operating-rods secured tothe cam, of a block adapted to the shell, a spring-pin on the blockadapted to the perforations of the shell, and a key-plug in the blockprovided with longitudinal bores to receive the rods.

4. In a lock-cylinder the combination with a cup-shaped shell havinginterior ribs, and a cam mounted on the cap of the shell, of a blockhaving grooves or channels adapted to receive the ribs, a key-plugwithin the block, extensible connections between the plug and cam, andextensible connections between the shell and block.

5. In a cylinder for looks, the combination with a shell having a seriesof holes in its wall and a perforation in its rear plate, a countersunkwasher in the perforation, a cam in the rear of the plate, andshouldered connectingrods in the shell passing through the washer andstem and being headed to secure the parts together, of a block having apin-chamber, a rotating key-plug normally communicating therewith andhaving longitudinal bores to receive the rods, and aspring-pressed pinon the rear of the block adapted to the holes in the shell-wall.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER CRAMOND.

Witnesses:

GEO. W. CRAMOND, WILLIAM C. J OHNSON.

